Tell you the main product types of coated sand

(1) Common coated sand Common coated sand is traditional coated sand. Its composition is usually composed of quartz sand, thermoplastic phenolic resin, urotropine and calcium stearate. No relevant additives are added. Its resin addition is usually relatively high under certain strength requirements. It does not have the characteristics of high temperature resistance, low expansion, low gas generation, etc. It is suitable for the production of castings with low requirements.

(3) Characteristics of high temperature resistant (class) coated sand (ND type): high temperature resistant, high strength, low expansion, low gas evolution, slow gas evolution, easy collapse and oxidation resistance Brief introduction: high temperature resistant coated sand is a new type of coated sand with excellent high temperature performance (high strength at high temperature, long heat resistance time, small thermal expansion, low gas evolution) and comprehensive casting performance produced by special process formula technology. This kind of coated sand is especially suitable for the production of complex thin-walled precision cast iron parts (such as automobile engine cylinder block, cylinder head, etc.) and high-demand cast steel parts (such as container angle and train brake slow; intermediate shell parts, etc.), which can effectively eliminate casting defects such as sand sticking, deformation, thermal cracking and porosity. At present, the coated sand has four series: VND-1 high temperature resistant coated sand. ND-2 high temperature resistant low expansion low gassing coated sand ND-3 high temperature resistant low expansion low gassing oxidation resistant coated sand ND-4 high temperature resistant high strength bottom low expansion low gassing film

(4) The easily collapsing coated sand has good strength and excellent low-temperature collapsibility, which is suitable for the production of non-ferrous metal castings.

(2) Characteristics of high-strength and low-gas coated sand: high-strength, low-expansion, low-gas, slow-gas and anti-oxidation Brief introduction: High-strength and low-gas coated sand is an updated product of common coated sand. By adding "additives" with relevant characteristics and adopting new preparation technology, the resin dosage is greatly reduced, its strength is more than 30% higher than that of common coated sand, the gas emission is significantly reduced, and the gas emission speed can be delayed, can better adapt to the needs of casting production. This kind of coated sand is mainly used in iron castings, small and medium-sized cast steel, alloy cast steel production. At present, there are three series of this kind of coated sand: GD-1 high-strength low-gas coated sand; GD-2 high-strength low-expansion low-gas coated sand; GD-3 high-strength low-expansion low-gas oxidation coating.

(5) Other Special Requirements Coated Sand In order to meet the needs of different products, a series of special coated sand have been developed, such as: coated sand for centrifugal casting, chilled coated sand, wet coated sand, anti-sticking sand, anti-veining, anti-orange peel coated sand, etc.

This article is finished by coated sand, the point of view of this article does not represent the point of view of this site.